2-[[6-[(3R)-3-aminopiperidin-1-yl]-3-methyl-2,4-dioxopyrimidin-1-yl]methyl]benzonitrile 2-[[6-[(3R)-3-amino-1-piperidyl]-3-methyl-2,4-dioxo-pyrimidin-1-yl]methyl]benzonitrile 2-[[6-[(3R)-3-amino-1-piperidinyl]-3-methyl-2,4-dioxo-1-pyrimidinyl]methyl]benzonitrile 2-[[6-[(3R)-3-amino-1-piperidyl]-2,4-diketo-3-methyl-pyrimidin-1-yl]methyl]benzonitrile 2-[[6-[(3R)-3-aminopiperidin-1-yl]-3-methyl-2,4-dioxo-pyrimidin-1-yl]methyl]benzonitrile